<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        function Person(name) {
            this.name = name;
        }
        const person = name => {
            this.name = name;
        }
        console.dir(Person, "P")
        console.dir(person, "p")
        const p1 = new Person("tom");
        console.log(p1);
        const p2 = new person("toma");//Uncaught TypeError: person is not a constructor
        console.log(p2);
    </script>
</body>

</html>